91.　 More than a dozen students in that school 　　　　abroad to study medicine last year.

A. sent　　　　　　　　　　 B. were sent　　　　　　 C. had sent　　　　　　　 D. had been sent

90.　 Months ago we sailed ten thousand miles across this open sea, which _______ the Pacific, and we met no storms.

A. was called　　　　 B. is called　 C. had been called　　 D. has been called

89.　 Susan decided not to work on the program at home because she didn’t’ want her parents to know what she __________.

A. has done　　　 　B. had done　　　　 C. was doing　　　　　 D. is doing

88.　 Nowadays, a large number of women, especially those from the countryside, _________ in the clothing industry.

A. is working　　　　 B. works　　　 C. work　　　 D. worked

87.　 The policeman's attention was suddenly caught by a small box which ______ placed under the Minister's car.

A. has been　　　　　　 B. was being　　　　 C. had been　　　　 D. would be

86.　 Years ago we didn't know this, but recent science ______ that people who don't sleep well soon get ill.

A. showed　　　　　　　 B. has shown　　　　 C. will show　　　　 D. is showing

85.　 They ________ on the program for almost one week before I joined them, and now we ______ it as no good results have come out so far.

A. had been working; are still working　　　 B. had worked; were still working

C. have been working; have worked　　　　　 D. have worked; are still working

84.　 -Why did you leave that position?

-I 　　　　a better position at IBM.

A. offer　　　　　　　　　 B. offered　　　　　　　　 C. am offered　　　　　 D. was offered

83.　 Scientists think that the continents 　　　　　always where they 　　　　　today.

A. aren’t; are　　　　　 B. aren’t; were　　　　 C. weren’t; are　　　　 D. weren’t; were

82.　 -Hurry up! Alice and Sue are waiting for you at the school gate.

-Oh! I thought they　 　　　　　without me.

A. went 　　　　　　　　　 B. are going 　　　　　 C. have gone 　　　　　 D. had gone